It is estimated that the net amount of carbon dioxide fixed by
ph...

Question

It is estimated that the net amount of carbon dioxide fixed by
photosynthesis on the landmass of Earth is 5.5 * 1016 g>yr
of CO2. Assume that all this carbon is converted into glucose.
(a) Calculate the energy stored by photosynthesis on
land per year, in kJ.

Accepted Answer

Hi everyone for this problem. We're told that a tree absorbs approximately 25 kg of carbon dioxide per year, calculate the average energy stored by photosynthesis and a tree per year assuming that all this carbon is converted into glucose for this problem. We're calculating energy and we know that energy is in kilo jewels. And we're told that it is by photosynthesis. So we need to recall the equation for photosynthesis. So let's go ahead and write that down. It is six carbon dioxides plus six waters yield sugar plus six oxygen's. And the change of entropy for photosynthesis is 2803 Kill it jules. So that is very important information that we're going to need in order to solve this problem. So let's go ahead and get started with what we're told. What we know is we have 25 kilograms of carbon dioxide. Okay. And we want to go from kilograms of carbon dioxide to energy. Okay, So we want to go from kilograms to kill a jewels. And in order for us to do that, we're going to use this change of entropy here. Okay, So let's go ahead and first start off by converting to grams and one kg we have grams. Okay, So our kilograms of carbon dioxide cancel. And we want to figure out how many moles of carbon dioxide we have And we can do that using the molar mass of carbon dioxide. So one mole of carbon dioxide Is 44.01 g. Okay, So now our grams cancel. And we're left with moles of carbon dioxide. So we want to know the energy so we want kila jewels and we can do this by using our change of entropy along with the mole low ratio of carbon dioxide. So if you take a look at our equation here for every six moles of carbon dioxide, we have 22803 Killah Jewels of Energy produced. So we can use that as a unit conversion here. So for every six moles of carbon dioxide we have 2000 803 Killah Jewels of Energy. So now our moles Of carbon dioxide cancel and we're left with killer jewels, which is what we're trying to solve for here. Energy stored by photosynthesis. So when we solve this, we get a final answer of 2.65 times to the fifth kill a jewel of energy stored by photosynthesis. Okay, so this is going to be our final answer right here. And that is the end of this problem. I hope this was helpful

It is estimated that the net amount of carbon dioxide fixed by photosynthesis on the landmass of Earth is 5.5 * 1016 g>yr of CO2. Assume that all this carbon is converted into glucose. (a) Calculate the energy stored by photosynthesis on land per year, in kJ.

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